阳离子淀粉/纳米多孔TiO2复合材料设计制备及协同降解染料废水的机理研究

项目名称： 阳离子淀粉/纳米多孔TiO2复合材料设计制备及协同降解染料废水的机理研究

项目编号： No.21206014

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 化学工程及工业化学

项目作者： 肖武

作者单位： 大连理工大学

项目金额： 25万元

中文摘要： 基于实现絮凝剂的原位再生、光催化剂的回收利用考虑，通过优势互补的过程耦合产生协同作用实现过程的强化。本项目拟采用天然、无毒的阳离子淀粉作为絮凝剂，纳米多孔TiO2作为光催化剂，通过均匀分散、化学键合、适度交联制备新型阳离子淀粉/纳米多孔TiO2复合材料。以活性红24等广泛使用的阴离子型染料溶液模拟染料废水为处理对象，开展絮凝-光催化氧化降解染料废水的研究，考察TiO2与阳离子淀粉配比、光照强度等工艺参数和纳米多孔TiO2形貌结构、交联度和淀粉取代度等材料特征参数对模拟废水的处理效果的影响，揭示阳离子淀粉絮凝和纳米多孔TiO2光催化氧化协同作用机理，建立描述絮凝、光催化氧化过程协同作用动态模型，获得絮凝/光催化氧化过程强化的机理和普遍性规律，实现絮凝/反应体系过程强化复合材料的控制制备和操作优化。通过优化结构设计和制备工艺，提高复合材料的稳定性，实现多次使用或催化剂回收利用。

中文关键词： 多孔淀粉；二氧化钛；吸附；光催化；染料废水

英文摘要： In this project, process intensification will be realized through synergy from coupling of the processes with complementary advantages, based on the in situ regeneration of the flocculant, the recycling of the photocatalyst. The project is designed to use natural, non-toxic cationic starch as flocculant, nano-porous TiO2 as photocatalyst, to synthesize novel cationic starch / nanoporous TiO2 composite through uniform dispersion,chemical bonding and moderate crosslinking. Solutions of C.I. Reactive Red 24 and other widely used anionic dyes will be used as simulated wastewater to carry out the study of flocculation -photocatalytic oxidative degradation of dye wastewater. The process parameters (ratio of TiO2 to cationic starch, light intensity, etc.) and characteristic parameters of the material (degree of substitution of cationic starch, morphology of nanoporous TiO2, etc.), on the effect of the treatment of the simulated wastewater, will be investigated to reveal the synergic mechanism of flocculation of the cationic starch and photocatalytic oxidation mechanism of nanoporous TiO2. The dynamic model for describing the synergy of the flocculation and photocatalytic oxidation will be established to obtain the mechanism and general rule of flocculation / photocatalytic oxidation process, and to achieve control prep

英文关键词： Porous starch；Titanium dioxide；Adsorption；Photocatalytic；Dye wastewater